﻿using CommonLib;
using CommonPay.WePay.XcxPay;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;

namespace CommonPay.WePay
{
    public class WeHelper
    {
        private static HttpClient _httpClient;
        public WeHelper()
        {
            if (_httpClient == null)
            {
                _httpClient = new HttpClient();
                _httpClient.Timeout = TimeSpan.FromSeconds(JsonConfig.GetJsonValue<int>("TimeOut") <= 0 ? 30 : JsonConfig.GetJsonValue<int>("TimeOut"));
            }
        }

        public static async Task<WxSession> GetWxSessionAsync(string code, PaySettings settings)
        {
            var url = string.Format(settings.WxSessionUrl, settings.WXAppID, settings.WXAppSecret,code);
            try
            {
                var response = await _httpClient.GetAsync(url);
                string result = await response.Content.ReadAsStringAsync();
                if (response.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    var model = JsonConvert.DeserializeObject<WxSession>(result);
                    return model;
                }
                else
                {
                    CommonLog.Error(typeof(WeHelper),$"GetWxSessionAsync请求失败,错误代码:{response.StatusCode},错误信息:{result}");
                }
            }
            catch (Exception ex)
            {
                CommonLog.Error(typeof(WeHelper), "GetWxSessionAsync请求失败:" + ex.Message);
            }
            return null;
        }

        public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            //直接确认，否则打不开    
            return true;
        }

        public static async Task<string> PostAsync(string xml, string url, bool isUseCert, int timeout)
        {
            System.GC.Collect();//垃圾回收，回收没有正常关闭的http连接
            string result = "";//返回结果
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            Stream reqStream = null;
            try
            {
                //设置最大连接数
                ServicePointManager.DefaultConnectionLimit = 500;
                //设置https验证方式
                if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                {
                    ServicePointManager.ServerCertificateValidationCallback =
                            new RemoteCertificateValidationCallback(CheckValidationResult);
                }

                /***************************************************************
                * 下面设置HttpWebRequest的相关属性
                * ************************************************************/
                request = (HttpWebRequest)WebRequest.Create(url);

                request.Method = "POST";
                request.Timeout = timeout * 1000;

                //设置POST的数据类型和长度
                request.ContentType = "text/xml";
                byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
                request.ContentLength = data.Length;

                //是否使用证书
                if (isUseCert)
                {
                    string path = AppContext.BaseDirectory;
                    X509Certificate2 cert = new X509Certificate2(path + XcxPayConfig.SSLCERT_PATH, XcxPayConfig.SSLCERT_PASSWORD);
                    request.ClientCertificates.Add(cert);
                    CommonLog.Info("XcxPayHttpService", "PostXml used cert");
                }
                //往服务器写入数据
                reqStream = await request.GetRequestStreamAsync();
                reqStream.Write(data, 0, data.Length);
                reqStream.Close();
                //获取服务端返回
                response =  (HttpWebResponse) await request.GetResponseAsync();
                //获取服务端返回数据
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                result = sr.ReadToEnd().Trim();
                sr.Close();
            }
            catch (System.Threading.ThreadAbortException e)
            {
                CommonLog.Error("XcxPayHttpService", "Thread - caught ThreadAbortException - resetting.");
                CommonLog.Error("Exception message: {0}", e.Message);
                System.Threading.Thread.ResetAbort();
            }
            catch (WebException e)
            {
                CommonLog.Error("XcxPayHttpService", e.ToString());
                if (e.Status == WebExceptionStatus.ProtocolError)
                {
                    CommonLog.Error("XcxPayHttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                    CommonLog.Error("XcxPayHttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                }
                throw new WxPayException(e.ToString());
            }
            catch (Exception e)
            {
                CommonLog.Error("XcxPayHttpService", e.ToString());
                throw new WxPayException(e.ToString());
            }
            finally
            {
                //关闭连接和流
                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }
            }
            return result;
        }

        public static async Task<string> GetAsync(string url)
        {
            System.GC.Collect();
            string result = "";

            HttpWebRequest request = null;
            HttpWebResponse response = null;

            //请求url以获取数据
            try
            {
                //设置最大连接数
                ServicePointManager.DefaultConnectionLimit = 200;
                //设置https验证方式
                if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                {
                    ServicePointManager.ServerCertificateValidationCallback =
                            new RemoteCertificateValidationCallback(CheckValidationResult);
                }

                /***************************************************************
                * 下面设置HttpWebRequest的相关属性
                * ************************************************************/
                request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "GET";

                //获取服务器返回
                response = (HttpWebResponse) await request.GetResponseAsync();

                //获取HTTP返回数据
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                result = sr.ReadToEnd().Trim();
                sr.Close();
            }
            catch (System.Threading.ThreadAbortException e)
            {
                CommonLog.Error("HttpService", "Thread - caught ThreadAbortException - resetting.");
                CommonLog.Error("Exception message: {0}", e.Message);
                System.Threading.Thread.ResetAbort();
            }
            catch (WebException e)
            {
                CommonLog.Error("HttpService", e.ToString());
                if (e.Status == WebExceptionStatus.ProtocolError)
                {
                    CommonLog.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                    CommonLog.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                }
                throw new WxPayException(e.ToString());
            }
            catch (Exception e)
            {
                CommonLog.Error("HttpService", e.ToString());
                throw new WxPayException(e.ToString());
            }
            finally
            {
                //关闭连接和流
                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }
            }
            return result;
        }
    }
    public class WxSession
    {
        public string openid { get; set; }
        public string session_key { get; set; }
        public string errcode { get; set; }
        public string errMsg { get; set; }
        public string unionid { get; set; }
    }
}
